Multi-function coffee maker and use thereof

ABSTRACT

This invention discloses a multi-function coffee maker comprising: a casing, a cover assembly with a brewing room inside, a water reservoir, a water pump, an electric heater, a water distributor assembly, a control valve assembly and a base assembly, wherein, said coffee maker further comprises more than one brewing accessory, which may be either an espresso coffee brewing accessory, or a drip coffee brewing accessory, or a tea brewing accessory; said brewing accessories are interchangeable and can be loaded within said brewing room of said cover assembly to form an individual brewing chamber; said water reservoir assembly, water pump, water distributor assembly, control valve assembly and brewing chamber construct the water loop of said coffee maker, water flow of different pressures may be generated within said water loop, and water flow of suitable pressure is provided into said brewing chamber according to the brewing requirements. According to the present invention, drip coffee, or espresso coffee, hot tea or ice tea may be brewed in the same coffee machine.

BACKGROUND OF THE INVENTION

[0001] 1. Technical Field

[0002] This invention relates to a multi-function coffee maker, which can be used to make espresso coffee or drip coffee or tea in the same machine.

[0003] 2. Background of the Invention

[0004] Brewing drip coffee requires 0-2.5 bar water, while brewing espresso coffee requires 8-10 bar water. The brewing requirement for tea is similar to that for drip coffee. The existing coffee machine such as a coffee maker or a coffee center can be used to make either drip coffee or espresso coffee, but can not be used to make both of drip coffee and espresso coffee in the same machine.

SUMMARY OF THE INVENTION

[0005] The main object of the present invention is to provide a multi-function coffee maker which can be used to make espresso coffee or drip coffee or tea in the same machine.

[0006] The coffee maker according to the present invention comprises: a casing, a cover assembly with a brewing room inside, a water reservoir, a water pump, an electric heater, a water distributor assembly, a control valve assembly and a base assembly, wherein, said coffee maker further comprises more than one brewing accessory, which may be either an espresso coffee brewing accessory, or a drip coffee brewing accessory, or a tea brewing accessory; said brewing accessories are interchangeable and can be loaded within said brewing room of said cover assembly to form an individual brewing chamber; said water reservoir assembly, water pump, water distributor assembly, control valve assembly and brewing chamber construct the water loop of said coffee maker, water flow of different pressures may be generated within said water loop, and water flow of suitable pressure is provided into said brewing chamber according to the brewing requirements.

[0007] Preferably, two kinds of water flow of different pressures can be generated within said water loop, one kind of water flow is of 0-2.5 BAR for brewing drip coffee or tea, the other kind of water flow is of 8-10 BAR for brewing espresso coffee.

[0008] Said brewing room may be fixed or replaceable, which can accommodate coffee capsules of various shapes or specifications, coffee pods of various shapes or specifications, coffee powder of various amount or specifications, or tea pods of various shapes or specifications.

[0009] Said coffee pods or coffee capsules may be used to brew drip coffee or espresso coffee.

[0010] Said coffee powder may be used to brew drip coffee or espresso coffee.

[0011] Said tea pods may be used to brew hot tea or ice tea.

[0012] With the above mentioned technical scheme adopted, drip coffee, or espresso coffee, hot tea or ice tea may be brewed in the same coffee machine by using different kinds of brewing accessories, coffee capsules, coffee pods, coffee powder or tea pods. The present invention is a significant innovation to the mono-function coffee makers existing in the market.

BRIEF DESCRIPTION OF THE DRAWINGS

[0013]FIG. 1a is a front perspective view of the multi-function coffee maker according to the present invention;

[0014]FIG. 1b is a back perspective view of the multi-function coffee maker according to the present invention;

[0015]FIG. 2 is a schematic view showing the open-close mechanism of the cover assembly of the multi-function coffee maker according to the present invention;

[0016]FIG. 3a is a schematic view showing the working principle when the water distributor assembly is working in combination with the control valve assembly;

[0017]FIG. 3b is a schematic view showing the working principle when the water distributor assembly and the control valve assembly are working separately;

[0018]FIG. 4a is a schematic view showing the brewing room suitable for accommodating the coffee capsule with the cover assembly closed;

[0019]FIG. 4b is a schematic view showing the brewing room suitable for accommodating the coffee capsule with the cover assembly opened;

[0020]FIG. 5 is a schematic view of the brewing chamber with an espresso coffee capsule loaded according to the present invention;

[0021]FIG. 6 is a schematic view of the brewing chamber with a drip coffee capsule loaded according to the present invention;

[0022]FIG. 7a is a schematic view of the brewing chamber with an espresso coffee pod or espresso coffee powder loaded according to the present invention;

[0023]FIG. 7b is a schematic view of the brewing chamber with a drip coffee pod, drip coffee powder or a tea pod loaded according to the present invention;

[0024]FIG. 7c is a sectional view of FIG. 7a or FIG. 7b along K-K line;

[0025]FIG. 7d is a sectional view of FIG. 7a or FIG. 7b along K-K line with the piston in the compression position.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0026] The present invention will be described in details in combination with the accompanying drawings and embodiments.

[0027] As shown in FIGS. 1a and 1 b, the coffee maker according to the present invention comprises a casing 500, a cover assembly 100 with a brewing room inside, a water reservoir 600, a water pump, an electric heater, a water distributor assembly 900, a control valve assembly, a base assembly 800 and a drip tray 700.

[0028] Said coffee maker further comprises more than one brewing accessory, which may be either an espresso coffee brewing accessory, a drip coffee brewing accessory or a tea brewing accessory. Said brewing accessories are interchangeable and can be loaded within said brewing room of said cover assembly to form an individual brewing chamber.

[0029] As shown in FIG. 2, said cover assembly 100 is constructed by an upper cover and a lower chamber joined together by an open-closed mechanism. Said open-close mechanism includes a rotary knob 50, a latch 51, a lock seat 52 and a hinge axle 53. By rotary knob 50, the latch 51 leaves away from the lock seat 52. By rotating the upper cover around the hinge axle 53, the cover assembly 100 is opened, and the brewing room inside is exposed. Load the brewing accessory inside the brewing room, close the cover assembly 100, then the latch 51 returns to the lock seat 52 automatically under the effect of the spring force, thus the brewing chamber is formed.

[0030] Said brewing room may be fixed or replaceable, which can accommodate coffee capsules of various shapes or specifications, coffee pods of various shapes or specifications, coffee powder of various amount or specifications, or tea pods of various shapes or specifications.

[0031] Said coffee pods or coffee capsules may be used to brew drip coffee or espresso coffee.

[0032] Said coffee powder may be used to brew drip coffee or espresso coffee.

[0033] Said tea pods may be used to brew hot tea or ice tea.

[0034] Said water reservoir assembly 600, water pump, water distributor assembly 900, control valve assembly and brewing chamber construct the water loop of said coffee maker, and water flow of different pressures may be generated within said water loop. Thereby, water flow of suitable pressure is provided into said brewing chamber according to the brewing requirements.

[0035] Preferably, two kinds of water flow of different pressures can be generated within said water loop, one kind of water flow is of 0-2.5 BAR for brewing drip coffee or tea, the other kind of water flow is of 8-10 BAR for brewing espresso coffee.

[0036]FIG. 3a is a schematic view showing the working principle when the water distributor assembly is working in combination with the control valve assembly. It is suitable for brewing coffee with coffee capsules.

[0037] Said control valve assembly is constructed by a T-connecting valve and a guided control valve. With said T-connecting valve, only one water pump is used for two water loops of different pressures. Said water loops of two different pressures are opened respectively to the brewing chamber loaded with either drip coffee brewing accessory, or espresso coffee brewing accessory or tea brewing accessory. Thereby, two different kinds of working modes are provided.

[0038] Alternatively, separate pumps may be used in the water loop.

[0039] The T-connecting valve comprises a valve body 20, a relief spring 21, a valve shaft 22 and a rubber plug 24, wherein, the relief spring 21 is mounted on the valve shaft 22, the O-shaped ring 23 is installed above the rubber plug 24, so as to form a relief valve.

[0040] In said guided control valve, espresso coffee control lever 25 and drip coffee control lever 26 are installed in parallel in the guided control valve body 27. An O-shaped ring 28 and a reset spring 29 are installed under both of the espresso coffee control lever 25 and the drip coffee control lever 26.

[0041] When the espresso coffee brewing accessory is loaded, the espresso coffee control lever 25 is pushed down, the drip coffee control lever 26 remains at the original position, i.e., channel A is opened, channel B is closed. Rotate the control knob 30 to a certain working mode to actuate the pump, the water heated by the electric heater enters the T-connecting valve, then the guided control valve, and finally outflows through channel A, thus, 6-10 BAR is obtained inside the brewing chamber for brewing espresso coffee. When the drip coffee brewing accessory is loaded, the drip coffee control lever 26 is pushed down, the espresso coffee control lever 25 remains at the original position under the effect of the reset spring 28, i.e., channel A is closed, channel B is opened. To overcome the elastic force of the relief spring 21 of the T-connecting valve, the water pressure in the loop is reduced by 7-8 BAR. Water flow entering the guided control valve outflows through channel B, thus, 0-2.5 BAR is obtained inside the brewing chamber for brewing drip coffee or tea.

[0042] Said water distributor assembly 900 consists of control knob 30, water distributor 33, distributor cover 32, distributor lever 31, sealed ring 35, reset spring 34, etc. By rotating the control knob 30 to compress or release the distributor lever 31, water loop is opened or disconnected, thus, the water loop with one inlet and two outlets is formed. The control principle is similar to that of said guided control valve.

[0043]FIG. 3b is a schematic view showing the working principle when the water distributor assembly and the control valve assembly are working separately. It is suitable for brewing coffee or tea with coffee pods, coffee powder, or tea pods.

[0044] By rotating the control knob 30 to a certain working mode to open channel C and simultaneously actuate the pump, water heated by the electric heater enters the T-connecting valve, then the water distributor, finally outflows through channel C to enter the brewing chamber. After brewing, by rotating the control knob 30 to a certain working mode to open channel E, water from the brewing chamber enters the T-connecting valve through the water-feeding opening D. Water flow through the water-feeding opening D opens the relief valve, enters the water distributor, then outflows through channel E, and is collected by the drip tray.

[0045] Said water distributor assembly and control valve assembly can be used in combination or separately. When they are working in combination, three kinds of working modes can be provided such as close, low pressure and high pressure. When they are working separately, in combination with the brewing accessory and the pressure hold valve, two kinds of working modes can be provided such as low pressure and high pressure

[0046] As shown in FIGS. 4a and 4 b, the brewing room is suitable for accommodating the coffee capsule. Said brewing room includes a drip water inlet and an espresso water inlet.

[0047] Water from the water reservoir is pumped by the pump, heated by the electric heater, then distributed by the T-connecting valve, guided controlled valve and the water distributor, finally enters the brewing room through drip water inlet or espresso water inlet for brewing coffee.

[0048] As shown in FIG. 5, an espresso coffee brewing accessory is loaded which includes an espresso coffee capsule 3 connected with the espresso water inlet 2, a filter plate 6 installed under the coffee capsule 3, a small pod cover 1 and a pressure limiting check valve consisting of a small pod seat 5, a discharge plug 8 with a spring 9 thereon and a discharge plug cover 10. Said water discharge plug 8 is installed under said filter plate 6, said plug cover 10 is installed at the water outlet, and a small pod sealing ring 7 is installed at the contact point between said filter plate 6 and said small pod seat 5. The guided control valve 11 is installed under the lower brewing chamber 13, and the small pod cover 1 is installed under the upper brewing chamber 4.

[0049] After the upper brewing chamber 4 is locked, the drip coffee control lever 25 is pressed down by the small pod seat 5. Then, channel A is opened by the guided control valve and channel B is closed. By rotating the control knob 30 to a certain working mode to actuate the pump, water heated by the electric heater enters the brewing chamber via the espresso water inlet and espresso coffee is made. Said pressure limiting check valve keeps the pressure within the brewing chamber at the range of 8-10 BAR when brewing espresso coffee.

[0050] As shown in FIG. 6, a drip coffee brewing accessory is loaded which includes a drip coffee capsule 17 connected with the drip coffee inlet 14, a big pod seat 15 installed under the upper brewing chamber 4, a big pod intermediate seat 16 installed under said big pod seat 15, a big pod elastic compression seat 18 under said drip coffee capsule 17, and a big pod spring 19 installed at the bottom of said big pod elastic compression seat 18.

[0051] After the upper brewing chamber 4 is locked, the drip coffee control lever 26 is pressed down by the big pod seat 15. Then, channel B is opened by the guided control valve and channel A is closed. By rotating the control knob 30 to a certain working mode to actuate the pump, water heated by the electric heater enters the brewing chamber via the drip water inlet and drip coffee is made.

[0052]FIGS. 7a, 7 b, 7 c and 7 d show the brewing room suitable for accommodating a coffee pod or coffee powder or a tea pod. Said brewing room includes a water inlet 40, a piston 48, a water inlet plug 43 installed under said water inlet 40 and within the inner hole of said piston 48, a guided shaft 45 with a guided shaft spring 46 mounted thereon, and a V-ring 47 mounted on said piston 48; said piston 48 can move up and down by compressing said guided shaft spring 46 along said guided shaft 45. Water from the pump is heated by the electric heater, and distributed by the water distributor and the T-connecting valve, finally, enters the brewing chamber via the water inlet 40 for brewing coffee.

[0053] A pressure hold valve 39 is also provided, when it is mounted, the pressure inside the brewing chamber is maintained at 8-10 BAR, which is suitable for brewing espresso coffee. When it is not mounted, the pressure inside the brewing chamber is at 0-2.5 BAR, which is suitable for brewing drip coffee or tea.

[0054]FIGS. 7a, 7 c, and 7 d show the brewing chamber when an espresso coffee brewing accessory is loaded, which includes espresso coffee pod or espresso coffee powder 37, filter plate 38 and pressure hold valve 39.

[0055]FIGS. 7b, 7 c, and 7 d shows the brewing chamber when a drip coffee brewing accessory is loaded, which includes a filter plate 38, drip coffee pod or drip coffee powder 41.

[0056] After loading the brewing accessory, close the cover assembly 100, rotate the control knob 30 to open channel C and actuate the pump. Water from the water reservoir 600 enters the T-connecting valve through the pump, and outflows through channel C of the water distributor 900. Then, water enters the piston 48 from the periphery of the water inlet plug 43 via the water inlet 40. The piston 48 moves downwards to the brewing accessory by compressing the guided shaft spring 46 along the guided shaft 45, and thus, with the aid of an O-shaped ring 49, a tightly sealed brewing chamber is formed. When the piston 48 reaches the compression position, the inlet plug 43 is blocked by the piston head 44 and will not move downwards along with the piston 48. Then, the inlet plug 43 and the piston 48 is no longer in the sealing status, water enters the brewing accessory through the inner hole of the piston 48, and thus, the espresso coffee, drip coffee or tea is made. After brewing, rotate the control knob 30 to shut off the pump, to open channel E and the relief water loop. The piston 48 moves upwards along the guided shaft 45 under effect of the spring 46, then the water plug 43 and the piston 48 are in the sealing status, the water within the piston 48 is forced to return to the T-connecting valve along the water-feeding opening D, enters the water distributor 900 via the water discharge channel E, and outflows into the drip tray. After that, the cover assembly 100 can be opened, the brewing accessory can be taken out, and thus the brewing is completed.

[0057] Said water reservoir assembly 600 may be replaceable or fixed. A water injection port 300 is installed at the back of the water reservoir, which may be used as a handle as well. Cold water may be filled by opening the water reservoir cover, or through the water injection port without opening the water reservoir cover.

[0058] Said drip tray assembly 700 is located below the brewed coffee outlet and is detachably connected with the base assembly 800, so as to be easy for detachment and clean. 

What is claimed is:
 1. A multi-function coffee maker comprises: a casing, a cover assembly with a brewing room inside, a water reservoir, a water pump, an electric heater, a water distributor assembly, a control valve assembly and a base assembly, wherein, said coffee maker further comprises more than one brewing accessory, which may be either an espresso coffee brewing accessory, or a drip coffee brewing accessory, or a tea brewing accessory; said brewing accessories are interchangeable and can be loaded within said brewing room of said cover assembly to form an individual brewing chamber; said water reservoir assembly, water pump, water distributor assembly, control valve assembly and brewing chamber construct the water loop of said coffee maker, water flow of different pressures may be generated within said water loop, and water flow of suitable pressure is provided into said brewing chamber according to the brewing requirements.
 2. A multi-function coffee maker according to claim 1, wherein, two kinds of water flow of different pressures can be generated within said water loop, one kind of water flow is of 0-2.5 BAR for brewing drip coffee or tea, the other kind of water flow is of 8-10 BAR for brewing espresso coffee.
 3. A multi-function coffee maker according to claim 1, wherein, said cover assembly is constructed by an upper cover and a lower chamber joined together by an open-closed mechanism; when the cover assembly is opened, the brewing room inside is exposed.
 4. A multi-function coffee maker according to claim 1, wherein, said brewing room can accommodate coffee capsules of various shapes or specifications, coffee pods of various shapes or specifications, coffee powder of various amount or specifications, or tea pods of various shapes or specifications.
 5. A multi-function coffee maker according to claim 2, wherein, said water distributor assembly is working in combination with the control valve assembly; said control valve assembly is constructed by a T-connecting valve and a guided control valve; with said T-connecting valve, only one water pump is used for two water loops of different pressures.
 6. A multi-function coffee maker according to claim 5, wherein, said T-connecting valve comprises a valve body, a relief spring, a valve shaft and a rubber plug, wherein, the relief spring is mounted on the valve shaft, the O-shaped ring is installed above the rubber plug, so as to form a relief valve.
 7. A multi-function coffee maker according to claim 5, wherein, said brewing room includes a drip water inlet and an espresso water inlet; water from the water reservoir is pumped by the pump, heated by the electric heater, then distributed by the T-connecting valve, guided controlled valve and the water distributor, finally enters the brewing room through drip water inlet or espresso water inlet for brewing coffee.
 8. A multi-function coffee maker according to claim 5, wherein, in said guided control valve, espresso coffee control lever and drip coffee control lever are installed in parallel in the guided control valve body; when the espresso coffee brewing accessory is loaded and the upper brewing chamber is locked, the drip coffee control lever is pressed down, channel A is opened by the guided control valve and channel B is closed; when the drip coffee brewing accessory is loaded and the upper brewing chamber is locked, the espresso coffee control lever is pressed down, channel B is opened by the guided control valve and channel A is closed.
 9. A multi-function coffee maker according to claim 8, wherein, an O-shaped ring and a reset spring are installed under both of the espresso coffee control lever and the drip coffee control lever.
 10. A multi-function coffee maker according to claim 7, wherein, an espresso coffee brewing accessory is loaded within said brewing room which includes an espresso coffee capsule connected with the espresso water inlet, a filter plate installed under the coffee capsule, a small pod cover and a pressure limiting check valve.
 11. A multi-function coffee maker according to claim 7, wherein, a drip coffee brewing accessory is loaded within said brewing room which includes a drip coffee capsule connected with the drip coffee inlet, a big pod seat, a big pod intermediate seat installed under said big pod seat, a big pod elastic compression seat under said drip coffee capsule, and a big pod spring installed at the bottom of said big pod elastic compression seat.
 12. A multi-function coffee maker according to claim 1, wherein, said water distributor assembly and the control valve assembly are working separately; said control valve assembly is constructed by a T-connecting valve.
 13. A multi-function coffee maker according to claim 5, wherein, said brewing room includes a water inlet, a piston, a water inlet plug installed under said water inlet and within the inner hole of said piston, a guided shaft with a guided shaft spring mounted thereon, and a V-ring mounted on said piston; said piston can move up and down by compressing said guided shaft spring along said guided shaft.
 14. A multi-function coffee maker according to claim 13, wherein, said brewing room further includes a pressure hold valve, when it is mounted, the pressure inside the brewing chamber is maintained at 8-10 BAR; when it is not mounted, the pressure inside the brewing chamber is at 0-2.5 BAR.
 15. A multi-function coffee maker according to claim 1, wherein, a water injection port is installed at the back of the water reservoir, which may be used as a handle as well.
 16. The use of a multi-function coffee maker according to claim 1, wherein, to brew drip coffee or espresso coffee with coffee pods or coffee capsules.
 17. The use of a multi-function coffee maker according to claim 1, wherein, to brew drip coffee or espresso coffee with coffee powder.
 18. The use of a multi-function coffee maker according to claim 1, wherein, to brew hot tea or ice tea with tea pods. 